just read below

So, my PC crashes sometimes when i play Roblox.

The problem:
I'm just playing Roblox. Randomly, both my monitors (happened to me when i only had 1 monitor too) lose signal, and the PC fans start blasting; but it's still on. (i know that because my PC crashed while talking with my friend, and i could still hear him.)

My specs:
i think its the MSI version of the RX 580 8GB
Ryzen 5 2600
8GB DDR4-2400MHz (4.1gb hardware reserved, im making a post about that too)
B450-A PRO MAX
800w PSU

It sometimes happens randomly (probably, i wasn't paying attention to the game before it crashes most of the time), and sometimes happens specifically. (pressing settings in the game, getting killed etc)

The first crash happened while i was playing the Roblox game Spelling Bee, specifically happened while i clicked the settings icon

Another crash (my last one while writing this post, haven't played roblox since) also happened in that game, but it happened right as i clicked play.

If you have any tips/help, please tell me!